h1{
    font-size:3rem!important;
    color:white!important;
    background-color:#3f51b5;
    border: 5px ridge #3f51b5;
    border-radius:10px;
    text-align:center;
    font-weight:bold;
}

h2{
    font-size:2rem!important;
    color:white!important;
    background-color:#42bef6;
    border: 5px ridge #42bef6;
    border-radius:10px;
    text-align:center;
}


h3{
    font-size:1rem!important;
    color:brown!important;
    background-color:yellow;
    border: 5px ridge #ffba62;
    border-radius:10px;
    text-align:center;
     
    margin:1rem auto!important;
  
}


img[src*="#aveccadre"]{/* pour encadrer certaines images*/
    border: 1px solid #ddd;
    box-shadow: 5px 10px 18px #888888;
}




@media print {

    h1{
        font-size:20pt!important;
        color:black!important;
        background-color:white!important;
        border: 1px solid black;
        border-radius: 0px;
        text-align:center;
        font-weight:bold;
    }
    
    h2{
        font-size:12pt!important;
        color:black!important;
        background-color:white!important;
        border: 1px dashed #aaa;
        border-radius:3pt;
        text-align:center;
    }


    .solution{
        display: none!important;
    }
}